pythonPackages.colorclass: Move to own file

pkgs/development/python-modules/colorclass/default.nix

···
+{ stdenv, buildPythonPackage, fetchPypi }:
+
+buildPythonPackage rec {
+  pname = "colorclass";
+  version = "2.2.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "b05c2a348dfc1aff2d502527d78a5b7b7e2f85da94a96c5081210d8e9ee8e18b";
+  };
+
+  # No tests in archive
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/Robpol86/colorclass;
+    license = licenses.mit;
+    description = "Automatic support for console colors";
+  };
+}

pkgs/top-level/python-packages.nix

···
 
   circus = callPackage ../development/python-modules/circus {};
 
-  colorclass = buildPythonPackage rec {
-    pname = "colorclass";
-    version = "2.2.0";
-    name = "${pname}-${version}";
-
-    src = fetchPypi {
-      inherit pname version;
-      sha256 = "b05c2a348dfc1aff2d502527d78a5b7b7e2f85da94a96c5081210d8e9ee8e18b";
-    };
-
-    # No tests in archive
-    doCheck = false;
-
-    meta = {
-      homepage = "https://github.com/Robpol86/colorclass";
-      license = licenses.mit;
-      description = "Automatic support for console colors";
-    };
-  };
+  colorclass = callPackage ../development/python-modules/colorclass {};
 
   colorlog = callPackage ../development/python-modules/colorlog { };